2015
DOI: 10.1643/ce-14-186
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Cohort-Dependent Sex Ratio Biases in the American Crocodiles (Crocodylus acutus)of the Tempisque Basin

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Cited by 13 publications
(19 citation statements)
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“…It is also possible that the recovered relationship between size and stress exists independently of anthropogenic disturbance but the presence of a stressor was necessary to statistically elucidate the relationship. These hypotheses regarding size-related mobility are contrary to a previous study that reported Crocodylus porosus hatchlings less than six months old dispersing an average of 3.5 km after human release at their respective nest [19], however, they partially corroborate the finding that sub-adult males are the primary dispersing cohort [20,21]. Although this may be a species specific or system specific behavior, juvenile crocodilians are capable of dispersal to avoid negative conspecific interaction.…”
Section: Discussioncontrasting
confidence: 69%
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“…It is also possible that the recovered relationship between size and stress exists independently of anthropogenic disturbance but the presence of a stressor was necessary to statistically elucidate the relationship. These hypotheses regarding size-related mobility are contrary to a previous study that reported Crocodylus porosus hatchlings less than six months old dispersing an average of 3.5 km after human release at their respective nest [19], however, they partially corroborate the finding that sub-adult males are the primary dispersing cohort [20,21]. Although this may be a species specific or system specific behavior, juvenile crocodilians are capable of dispersal to avoid negative conspecific interaction.…”
Section: Discussioncontrasting
confidence: 69%
“…Although this may be a species specific or system specific behavior, juvenile crocodilians are capable of dispersal to avoid negative conspecific interaction. [19][20][21].…”
Section: Discussionmentioning
confidence: 99%
“…These drainages included the irrigation drain on the northwest border of the park, the Tempisque River between El Viejo sugarcane farm and the Bebedero River junction, and the Bebedero River between the northeast border of the park and the Tempisque River [see Murray et al (2015) for detailed description of the study site]. Nests were located from a boat via visual inspection of the bank for slides, cleared areas, and suitable substrate.…”
Section: Field Methodsmentioning
confidence: 99%
“…Further, Charruau (2012) issues a warning that the sex ratio shift will depend on the magnitude of temperature increase and its effect on the female-male-female (FMF) sex determination scheme characteristic of the American crocodile, a scheme in which 31°C and 33°C are the temperatures between which males can be produced (Lang and Andrews, 1994;Charruau, 2012). Murray et al (2015) and Bolaños-Montero (2012) report an unusually high male-bias in American crocodiles of the Tempisque Basin, Guanacaste, Costa Rica. This 3.4:1 male bias is one of the most extensive male biases within the genus Crocodylus reported to date (Thorbjarnarson, 1997).…”
Section: Introductionmentioning
confidence: 99%
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